Internal-combustion engine



A. I. KRAUSE. INTERNAL COMBUSTION ENGINE.

APPLICATION FILED OCI'. I0. IQZI.

Patented Nov. 2 l, 1922;."

- W/T/VESSES Patented Nov, 21, 1922.. J

l NETE@ STATES PATIENT' @FFTCEL ARTHUR JOSEPH KRAUSE, F CLEVELAND, OHIO. INTRNAL-COMBUS'VIION ENGINE Application filed October 10, 1921 Serial No. 506,785.

To ZZ whom it may concern.' 10 which in accordance with my invention vBe it known that I, ARTHUR J. KRAUSE, has a bore or bores 11 of oval shape with y a citizen of the United States, and a resident their direction of greatest. diameter at right of Cleveland, in the county of Cuyahoga and angles to the lon itudinal axis of the block State of Ohio, have invented certain new or in other wors at right angles t0 the 6o Aand useful Improvements in Internal-Comcrank shaft so that the connecting rod 12 bustion Engines, of which the following is Ofeach piston 13 is permitted to swing in a specilication" the direction of this greatest diameter and My present invention relates generally to thus to a much greater degree than is poslo internal combustion engines and more parsible with a cylindrical bore and piston hav- 65 ticularly to that type of motor commonly ing the same or nearly the same area of known as a small bore long stroke motor, Combustion space above the piston 13. my primary object being. the provision of The piston 13 as particularly shown in certain means whereby with a small bore a Figures 2 and 3 is of the same shape as the much longer stroke will be permitted than receiving bore of the cylinder block 10 and 70 that of which the usual cylindrical bore and iS prOVded Withv ring gIOOVeS 14 Il eaCh 0f piston are capable. l which a pair of rings 15 is preferably dis- It is a well known fact that in all long posed. stroke motors, the length of the stroke is Each ring is in one piece with its free ends limited by the lateral swing of the connect- 16 in overlapping relation in the plane of the 75 ing rod of each piston Iin the lower portion greatest axis of the'piston so that the rings of the cylinder diametrically of the latter will expand uniformly and evenly, the rings and to increase the length of the stroke it of each groove 14 being inw reversed relation thus becomes necessary to increase the bore that is with the free ends 16 of one ring of the cylinder and the diameter of the pisat one side of the piston and the free ends 8@ ton. of the other ring at the opposite side 0f the My improvement aims to permit of inpiston. crease of the length of the stroke without Owing to the above shape and arrangeincreasing the area of the combustion space ment of the parts it is quite obvious that above the piston and t0 do this I propose an the advantages of the ordinary cylindrical 85 internal combustion engine having each of form of the parts will be retained and in its piston chambers or bores of oval shape addition thereto. a longer stroke in com-- with its greatest axis at right .angles to the parison to area of combustion space will be longitudinal axis of the engine or in other provided lfor. Y words to the plane of the crank shaft so as An engine so constructed will have a more 90 to. permit of maximum swing of the connectuniform torque, greater power and speed and ing rod. will be much more economical in operation In the accompanying drawing which illusas compared with a motorof the usual type trates my present invention and forms a. constructed to provide for the same length e@ part of this specication, y of stroke. 95

Figure 1 is a vertical sectionV taken trans- I claim: versely through a portion of the motor along 1. A cylinder block for internal combusthe line of greatest diameter of one of the tionl engines having an oval cylinder whose bores, with the piston therein partly broken direction of greatest diameter is disposed at away, y right angles to the longitudinal axis of the 100 Figure 2 is a perspective view of the pisblock, and a similarlyshaped piston movton removed, y .I ably interfitting said cylinder having a con- Figure 3 is a horizontal section through necting rod swingable in the direction of the the piston in the plane of one of the piston greatest diameter of the bore and piston. E rin grooves, and 2. A cylinder block for internal cornbus- 105 igure 4 is a diagrammatic plan view of tion engines having an oval piston bore and a cylinder block showing the arrangement an oval piston movably interfitting the bore, of four pistons therein. having a connectingrrod swingable in the Referring now to these figures I have direction of the greatest diameter of the bore shown in Figures 1 and 4 a cylinder block and pistoni. 110

3. A cylinder block for Linternal combus- 4. The combination with an engine cylintion'engines having an oval bore, an oval der having a transversely elongated bore, of piston in the bore having a ring groove, and a piston fitting said bore, land a rod Con- 1( a pair of oppositely disposed rings in the nected to the piston and swinging in the di- 5 groove, each ring having free ends overlapreeton of greatest diameter of the bore and f pmg in line With the direction of greatest piston. i.

diameter of the piston. f ARTHUR JOSEPH KRAUSE. 

